Proper Shipping Name Marking vs UN Number Marking: Which Goes Where?

Proper Shipping Name Marking The standardized transport name of a hazardous material marked on a package when required by the applicable regulations. While this is the required text identifying the hazard on a package, it often appears together with a UN/NA identification number, hazard class labels, and other required markings — but each element serves a distinct purpose and has separate placement and formatting rules.

Confusion commonly arises because the proper shipping name and the UN number are paired in regulatory entries, yet they are different kinds of identifiers: the proper shipping name is the textual name of the hazard; the UN/NA number is a numeric identifier used internationally to link to classification and emergency response information. Rules specify when each must be on a package, where on the package they must appear, and how large and durable the markings must be.

How The Two Markings Differ

• Proper Shipping Name: The regulated textual name exactly as listed in the Hazardous Materials Table. Required on packages when the HMT entry calls for a package marking and when exceptions do not apply.
• UN/NA Number: A four-digit numeric code (e.g., "UN1203") that may be required on the package, often in conjunction with the proper shipping name, or alone when regulations allow.

Placement And Format Requirements

Regulations spell out legibility, visibility, and durability standards for each marking. Typical requirements include minimum letter size, contrast with background, and placement so the marking can be read without moving the package. The UN number is often presented with the letters "UN" immediately preceding the number, while the proper shipping name must match punctuation and capitalization rules in the controlling table.

When One Can Replace The Other

There are limited cases where a UN number may be used on its own (for instance, certain bulk packagings) or where regulatory exceptions (like limited quantity exceptions or specific consumer commodity provisions) reduce package-level marking needs. However, you should not assume absence of a proper shipping name marking is acceptable simply because a UN number is present. Check the specific Hazardous Materials Table entry and the modal regulations (air/sea) for exceptions.

Practical Steps To Avoid Mistakes

• Cross-Check The HMT: Use the Hazardous Materials Table entry for the material to determine whether both the proper shipping name and UN number are required on package markings.
• Verify Modal Requirements: IATA and IMDG can require different wording or placement, especially for air transport where marking rules are stricter.
• Document Exceptions: When applying a limited quantity or consumer commodity exception that changes marking requirements, keep the justification visible in the shipment file and on shipping papers as required.

Example Comparison

Consider a hazardous liquid entry that lists "GASOLINE" with UN1203. For a full regulated shipment by road, the drums will typically need the proper shipping name "GASOLINE" on the drum and the UN number "UN1203" when the HMT mandates it. For small consumer-sized retail packages qualifying under a limited quantity exception, the drum may not need the full proper shipping name on each inner package; instead, outer packaging or shipping papers may carry the required identification.

Who Should Care Most

• Shippers: Responsible for accurate packaging and marking before the carrier accepts the load.
• Warehouse Teams: Must apply or verify markings during packing and staging operations to prevent carrier rejection.
• Carriers and Drivers: Require clear markings to load, segregate, and transport safely.

In short, the Proper Shipping Name Marking is the regulatory text name of the hazardous material and is complementary to, but not interchangeable with, the UN/NA number marking. Both must be applied according to the Hazardous Materials Table, modal rules, and any applicable exceptions — and proper handling requires confirming both pieces for every shipment.